You can often rent or buy the movie here. Check the "Languages" section on the movie's detail page to confirm the Telugu dub is included.
If you want to watch the movie in high definition with the official Telugu audio track, here are your best options: kung fu panda 3 moviezwap in telugu portable
These files are usually "cam-rips" or heavily compressed, ruining the beautiful animation DreamWorks is known for. You can often rent or buy the movie here